<?php get_header(); ?>
<?php include 'main-menu.php'; ?>
<div class="container group">

   <?php get_sidebar(); ?>
   <div class="main-container">
      <h2 style="margin: 20px auto; font-size: 30px">Lỗi 404 - Không tìm thấy trang</h2>
   </div>
   <!--main-container-->
</div>
<?php get_footer(); ?>        